Motor stator busbar

Abstract

The utility model relates to the technical field of motor stators, and discloses a motor stator busbar, which comprises a U-phase busbar, a V-phase busbar, a W-phase busbar, a neutral point connecting busbar and a busbar shell, wherein the U-phase busbar, the V-phase busbar and the W-phase busbar are arranged at intervals along the same axis and are configured to be arc-shaped; the outer side edges of the U-phase busbar, the V-phase busbar and the W-phase busbar are respectively provided with a wiring point used for being connected with an inverter side busbar and a welding point used for being connected with an outgoing line of a pin winding; the neutral point connecting busbar is divided into at least two sections, and each section is provided with a neutral point welding point used for being connected with an outgoing line of the pin winding. The welding points are uniformly arranged on the outer side of the busbar, outgoing lines of the motor stator are arranged from the welding side, and the outgoing lines do not penetrate through the busbar, so that the radial size and the process difficulty of the busbar are effectively reduced; the neutral point connecting busbar is arranged to be in a multi-section type, and the position of the multi-section structure can be adjusted in the circumferential direction of an arc to achieve position adjustment of a neutral point welding point so as to be suitable for different pin winding wire outlet modes.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stators, and more specifically, to a motor stator busbar. Background Art

[0002] With the rapid growth of China's new energy vehicle market and the rapid development of new energy vehicle technology, electric drive systems are gradually moving towards higher speed, miniaturization, and high efficiency. At the same time, the entire vehicle is placing higher demands on the cost and performance of electric drive systems. Consequently, motor assemblies are gradually moving towards miniaturization and integration. Hair-pin flat wire motors are increasingly favored due to their high slot fill rate and high power density. As the number of parallel branches and layers increases, the lead wires become increasingly complex. To reduce assembly difficulty, minimize errors, improve the appearance quality of the motor stator assembly, and enable automated production, hair-pin flat wire motors often use a busbar assembly to shape and connect their lead wires. Utility Model Content

[0003] The utility model aims to provide a motor stator busbar to solve the problem of how to shape and connect complex hair-pin flat wire motor stator lead wires in a limited space.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A motor stator busbar, comprising:

[0006] U-phase busbar 100;

[0007] V-phase busbar 200;

[0008] W-phase busbar 300;

[0009] The neutral point is connected to busbar 400;

[0010] Busbar housing 500; wherein,

[0011] The U-phase busbar 100, the V-phase busbar 200, and the W-phase busbar 300 are all arc-shaped and spaced apart along the same axis. The outer sides of the U-phase busbar 100, the V-phase busbar 200, and the W-phase busbar 300 are each provided with a connection point for connecting to the inverter-side busbar and at least one welding point for connecting to the lead wire of the pin winding;

[0012] The neutral point connection busbar 400 is also arc-shaped and is spaced apart from the U-phase busbar 100, the V-phase busbar 200, and the W-phase busbar 300 along the same axis and is located at the top. The neutral point connection busbar 400 is divided into at least two sections, each of which is provided with a neutral point welding point for connecting to the lead wire of the pin winding.

[0013] The busbar housing 500 covers the outer sides of the U-phase busbar 100 , the V-phase busbar 200 , the W-phase busbar 300 , and the neutral point connection busbar 400 .

[0014] Furthermore, the arc radii of the U-phase busbar 100 , the V-phase busbar 200 , the W-phase busbar 300 and the neutral point connection busbar 400 are the same.

[0015] Furthermore, the number of the welding points on the U-phase busbar 100 , the V-phase busbar 200 , and the W-phase busbar 300 is three.

[0016] Furthermore, the neutral point connection busbar 400 is divided into three sections, and each section is provided with three neutral point welding points for connecting to the lead wires of the pin winding.

[0017] Furthermore, the welding point is led out from the outer edges of the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 and extends upward; the neutral point welding point is led out from the outer edge of the neutral point connecting busbar 400 and extends upward.

[0018] Furthermore, the welding point and the neutral point welding point are connected to the lead wires of the pin winding by laser welding or TIG welding.

[0019] Furthermore, a rivet nut is provided on the wiring point, and the wiring point is threadedly connected to the inverter-side busbar through the rivet nut.

[0020] Furthermore, the rivet nut is of a closed type.

[0021] Furthermore, the busbar housing 500 is injection molded to cover the outer sides of the U-phase busbar 100 , the V-phase busbar 200 , the W-phase busbar 300 and the neutral point connection busbar 400 .

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model provides a kind of motor stator busbar, welding point of U, V, W and neutral point is arranged uniformly outside busbar, pin winding is wired from stator welding side, the design of lead wire does not pass through busbar, effectively reduce the radial volume and process difficulty of busbar;Welding point is led out by busbar outside side, and extend upwards, when pin winding lead wire is welded, it can be conveniently clamped and positioned by simple tooling, effectively improve production efficiency;Neutral point connection busbar is provided as three-section type, one can reduce raw material cost, realize light weight, two, three-section type can adjust position on the circumference of arc, to realize the position adjustment of neutral point welding point, to adapt to different pin winding wiring mode.

[0024] The utility model provides a kind of motor stator busbar, busbar assembly is equipped with the complex winding form of eight layers hair-pin winding, 18 lead wires are uniformly welded and fixed on busbar assembly, and simultaneously lead out wiring terminal that can be directly connected with inverter assembly, and can be positioned by simple tooling, i.e. it can realize stator assembly assembly. DRAWINGS

[0025] The utility model will be further described below in connection with the drawings:

[0026] Figure 1 It is a structure explosion chart of a kind of motor stator busbar in one embodiment;

[0027] Figure 2 It is a structure schematic view of a kind of motor stator busbar in one embodiment;

[0028] Figure 3 It is a structure schematic view of motor stator and pin winding in one embodiment;

[0029] Figure 4 It is the assembly structure schematic view of a kind of motor stator busbar and motor stator and pin winding in one embodiment;

[0030] Figure 5 It is Figure 4 Enlarged schematic view in A place;

[0031] 1.busbar;

[0032] 100.U phase busbar, 110.U phase wiring point, 120.U phase welding point;

[0033] 200.V phase busbar, 210.V phase wiring point, 220.V phase welding point;

[0034] 300.W phase busbar, 310.W phase wiring point, 320.W phase welding point;

[0035] 400.neutral point connection busbar, 410.send nail pipe;

[0036] 500. Busbar housing;

[0037] 600. Self-clinching nut;

[0038] 2. Pin winding;

[0039] 700. Lead wire;

[0040] 3. Motor stator. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See Figures 1 to 5 This embodiment provides a motor stator busbar, wherein the busbar 1 is used to shape and connect the lead wires 700 of the pin winding 2 of the motor stator 3. The motor stator 3 is equipped with an eight-layer hair-pin winding. The 18 lead wires 700 of the pin winding 2 are uniformly welded and fixed on the busbar 1 and can be directly connected to the inverter assembly at the same time. The busbar 1 includes: a U-phase busbar 100, a V-phase busbar 200, a W-phase busbar 300, a neutral point connection busbar 400 and a busbar housing 500.

[0043] The U-phase busbar 100 , the V-phase busbar 200 and the W-phase busbar 300 are all constructed in an arc shape. The U-phase busbar 100 , the V-phase busbar 200 and the W-phase busbar 300 are spaced apart along the same axis and have the same arc radius, which can reduce the radial size of the busbar 1 .

[0044] The outer sides of the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 are each provided with a connection point for connecting to the inverter-side busbar, namely the U-phase connection point 110, the V-phase connection point 210 and the W-phase connection point 310; the outer sides of the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 are also respectively provided with at least one welding point for connecting to the lead wire 700 of the pin winding 2. The busbar 1 is equipped with an eight-layer hair-pin winding, and the pin winding 2 is composed of two branches in parallel, with wires leading out from the welding side, with a total of 18 lead wires 700, of which U, V, and W phases have 3 lead wires 700 respectively. Therefore, the number of welding points on the U-phase busbar 100, the V-phase busbar 200, and the W-phase busbar 300 are all three, namely U-phase welding point 120, V-phase welding point 220, and W-phase welding point 320.

[0045] In this embodiment, the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 are all integrated arc structures. In another embodiment, the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 can also be set to a segmented arc structure. The advantage of the segmented arc structure is that it can reduce the cost of raw materials and achieve the purpose of lightweighting; most importantly, after the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 are set to a segmented arc structure, each segment can be adjusted in the circumferential direction of the arc of the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300, thereby realizing the position adjustment of the welding point and the connection point on each segment to adapt to different lead-out wire forms.

[0046] The neutral point connection busbar 400 is also constructed in an arc shape. The radius of the arc of the neutral point connection busbar 400 is the same as the arc radius of the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300. The neutral point connection busbar 400 and the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 are spaced apart along the same axis and are located at the top.

[0047] The neutral point busbar 400 is divided into at least two sections, each of which is provided with a neutral point welding point for connection to the lead wires of the pin winding. The advantage of dividing the neutral point busbar 400 into multiple sections is that it can reduce raw material costs and achieve lightweighting. Most importantly, after the neutral point busbar 400 is divided into multiple sections, the position of each section can be adjusted along the arc of the neutral point busbar 400, thereby adjusting the position of the neutral point welding point on each section to accommodate different lead wire configurations.

[0048] Since the pin winding 2 in this embodiment has a total of 18 lead wires 700, of which the three phases U, V, and W have three welding points respectively, leaving 9 neutral welding points, the neutral point connection busbar 400 is divided into three sections, and each section is provided with three neutral point welding points 410 for connecting to the lead wires 700 of the pin winding 2.

[0049] The U-phase welding point 120 , the V-phase welding point 220 , the W-phase welding point 320 and the neutral point welding point 410 are all connected to the lead wires of the pin winding by laser welding or TIG welding, and the welding points are coated after welding.

[0050] In this embodiment, the U-phase welding point 120, the V-phase welding point 220, and the W-phase welding point 320 are respectively led out from the outer edges of the U-phase busbar 100, the V-phase busbar 200, and the W-phase busbar 300 and extend upward. The neutral point welding point 410 is led out from the outer edge of the neutral point connecting busbar 400 and extends upward. The upward extension of the U-phase welding point 120, the V-phase welding point 220, the W-phase welding point 320, and the neutral point welding point 410 facilitates clamping with a fixture when welding with the lead wire 700, improving welding stability and efficiency.

[0051] The U-phase connection point 110 , the V-phase connection point 210 , and the W-phase connection point 310 are all provided with a rivet nut 600 , and the U-phase connection point 110 , the V-phase connection point 210 , and the W-phase connection point 310 are threadedly connected to the inverter-side busbar through the rivet nut 600 .

[0052] In this embodiment, the rivet nut 600 is of a closed type, which prevents iron chips from falling off during tightening and improves cleanliness.

[0053] The busbar housing 500 covers the outer sides of the U-phase busbar 100 , the V-phase busbar 200 , the W-phase busbar 300 and the neutral point connection busbar 400 , and performs axial positioning through the bottom of the busbar housing 500 , thereby improving assembly accuracy and convenience.

[0054] In this embodiment, the busbar housing 500 is formed by injection molding to cover the outer sides of the U-phase busbar 100 , the V-phase busbar 200 , the W-phase busbar 300 and the neutral point connection busbar 400 .

[0055] This embodiment provides a wiring method for a motor stator bus:

[0056] The busbar 1 is equipped with an eight-layer hair-pin winding. The pin winding 2 assembly consists of two branches in parallel, with wires coming out from the welding side. There are 18 lead wires 700 in the three branches, of which U, V, and W phases have three lead wires 700 respectively, and the remaining nine neutral point lead wires 700. During welding, the U-phase busbar 100 is first fixedly clamped with the three U-phase lead wires 700 of the eighth layer by a fixture, and connected by laser welding or TIG welding. Then, the V-phase busbar 200 and the W-phase busbar 300 are connected in turn, and the connection method is the same as that of the U-phase busbar 100. The neutral point connection busbar is then fixedly clamped with the nine neutral point lead wires 700 of the eighth layer by a fixture, and connected by laser welding or TIG welding. After all welding is completed, the welds need to be coated.

[0057] After the lead wire 700 of the pin winding 2 is welded, the U-phase busbar 100, the V-phase busbar 200 and the W-phase busbar 300 are threadedly connected to the inverter-side busbar through the rivet nuts 600 on the U-phase connection point 110, the V-phase connection point 210 and the W-phase connection point 310.

[0058] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor stator busbar, characterized in that: include: U-phase busbar (100); V-phase busbar (200); W-phase busbar (300); Neutral point connection busbar (400); Busbar housing (500); wherein, The U-phase busbar (100), the V-phase busbar (200), and the W-phase busbar (300) are all constructed in an arc shape and are spaced apart along the same axis. The outer sides of the U-phase busbar (100), the V-phase busbar (200), and the W-phase busbar (300) are each provided with a connection point for connecting to an inverter-side busbar, and at least one welding point for connecting to a lead wire of a pin winding; The neutral point connection busbar (400) is also constructed in an arc shape, and is spaced apart from the U-phase busbar (100), the V-phase busbar (200), and the W-phase busbar (300) along the same axis, and is located at the top; the neutral point connection busbar (400) is divided into at least two sections, and each section is provided with a neutral point welding point for connecting to the lead wire of the pin winding; The busbar housing (500) covers the outer sides of the U-phase busbar (100), the V-phase busbar (200), the W-phase busbar (300) and the neutral point connection busbar (400).

2. The motor stator busbar according to claim 1, characterized in that: The arc radii of the U-phase busbar (100), the V-phase busbar (200), the W-phase busbar (300) and the neutral point connection busbar (400) are the same.

3. The motor stator busbar according to claim 1, characterized in that: The number of the welding points on the U-phase busbar (100), the V-phase busbar (200), and the W-phase busbar (300) is three.

4. The motor stator busbar according to claim 3, characterized in that: The neutral point connection busbar (400) is divided into three sections, and each section is provided with three neutral point welding points for connecting to the lead wires of the pin winding.

5. The motor stator busbar according to claim 1, characterized in that: The welding points are led out from the outer sides of the U-phase busbar (100), the V-phase busbar (200) and the W-phase busbar (300) and extend upward; the neutral point welding points are led out from the outer side of the neutral point connecting busbar (400) and extend upward.

6. The motor stator busbar according to claim 5, characterized in that: The welding points and the neutral point welding point are connected to the lead wires of the pin winding by laser welding or TIG welding.

7. The motor stator busbar according to claim 1, characterized in that: The connection point is provided with a rivet nut, and the connection point is threadedly connected to the inverter-side busbar through the rivet nut.

8. The motor stator busbar according to claim 7, characterized in that: The pressure rivet nut is a closed type.

9. The motor stator busbar according to claim 1, characterized in that: The busbar housing (500) is injection-molded to cover the outer sides of the U-phase busbar (100), the V-phase busbar (200), the W-phase busbar (300), and the neutral point connection busbar (400).

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